This patch fixes "operation on 'v1' may be undefined" warning in sial_exeop(). In some places V1 and L1 where used as arguments at the same time. It's from lkcdutils and has been there in CVS for a few month. Originally written by Jan Blunck <jblunck(a)suse.de&gt;. Signed-off-by: Bernhard Walle <bwalle(a)suse.de&gt; --- extensions/libsial/sial_op.c | 95 ++++++++++++++++++++++++++----------------- 1 file changed, 59 insertions(+), 36 deletions(-) --- a/extensions/libsial/sial_op.c +++ b/extensions/libsial/sial_op.c @@ -28,15 +28,15 @@ typedef struct { #define V3 (v3?v3:(v3=NODE_EXE(P3))) #define V4 (v4?v4:(v4=NODE_EXE(P4))) -#define L1 (unival(v1?v1:V1)) -#define L2 (unival(v2?v2:V2)) -#define L3 (unival(v3?v3:V3)) -#define L4 (unival(v4?v4:V4)) - -#define S1 ((v1?v1:V1)->v.data) -#define S2 ((v2?v2:V2)->v.data) -#define S3 ((v3?v3:V3)->v.data) -#define S4 ((v4?v4:V4)->v.data) +#define L1 (unival(V1)) +#define L2 (unival(V2)) +#define L3 (unival(V3)) +#define L4 (unival(V4)) + +#define S1 ((V1)->v.data) +#define S2 ((V2)->v.data) +#define S3 ((V3)->v.data) +#define S4 ((V4)->v.data) void sial_do_deref(int n, value_t *v, value_t *ref); ul @@ -545,39 +545,53 @@ inval: case ADD: { /* expr + expr */ /* adding two pointers ? */ if(V2->type.type == V_REF) goto inval; - sial_transfer(v=sial_newval(), V1, L1 + L2*size); + + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) + L2 * size); } break; case SUB: { /* expr - expr */ - /* different results if mixed types. if both are pointers then result is a V_BASE */ if(V2->type.type == V_REF) v=sial_makebtype(L1 - L2); - else sial_transfer(v=sial_newval(), V1, L1 - L2*size); + else { + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) - L2 * size); + } } break; case PREDECR: { /* pre is easy */ - sial_transfer(v=sial_newval(), V1, L1-size); - sial_setval(V1, v); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) - size); + sial_setval(v1, v); } break; case PREINCR: { - sial_transfer(v=sial_newval(), V1, L1+size); - sial_setval(V1, v); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) + size); + sial_setval(v1, v); } break; case POSTINCR: { - sial_transfer(v=sial_newval(), V1, L1+size); - sial_setval(V1, v); - sial_transfer(v, V1, L1); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) + size); + sial_setval(v1, v); + sial_transfer(v, v1, unival(v1)); } break; case POSTDECR: { - sial_transfer(v=sial_newval(), V1, L1-size); - sial_setval(V1, v); - sial_transfer(v, V1, L1); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) - size); + sial_setval(v1, v); + sial_transfer(v, v1, unival(v1)); } break; default: @@ -625,26 +639,33 @@ inval: } break; case PREDECR: { /* pre is easy */ - sial_transfer(v=sial_newval(), V1, L1-1); - sial_setval(V1, v); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) - 1); + sial_setval(v1, v); } break; case PREINCR: { V1; - sial_transfer(v=sial_newval(), V1, L1+1); - sial_setval(V1, v); + sial_transfer(v=sial_newval(), v1, + unival(v1) + 1); + sial_setval(v1, v); } break; case POSTINCR: { - sial_transfer(v=sial_newval(), V1, L1+1); - sial_setval(V1, v); - sial_transfer(v, V1, L1); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) + 1); + sial_setval(v1, v); + sial_transfer(v, v1, unival(v1)); } break; case POSTDECR: { - sial_transfer(v=sial_newval(), V1, L1-1); - sial_setval(V1, v); - sial_transfer(v, V1, L1); + V1; + sial_transfer(v=sial_newval(), v1, + unival(v1) - 1); + sial_setval(v1, v); + sial_transfer(v, v1, unival(v1)); } break; default: sial_rerror(&P1->pos, "Oops ops ! [%d]", top); @@ -682,12 +703,14 @@ doop: else { /* if it's a Me-op then v is already set */ - if(top != o->op) { sial_setval(V1, v); } - else { - - sial_setval(V1, V2); + V1; + if(top != o->op) { + sial_setval(v1, v); + } else { + sial_setval(v1, V2); v=sial_cloneval(V2); } + } } /* the result of a assignment if not an Lvalue_t */